The
Wheel of Time rulebook mentions several items made by healers,
Wisdoms, and herbalists, but doesn't provide rules on how to make them.
A few items also made by these types of craftspeople are also mentioned
in this book.

Making
balms, antitoxins, and poisons requires the Craft (herbalism) skill.
This variant of the Craft skill cannot be used untrained; only
characters with actual ranks in Craft (herbalism) can attempt to make
these items. A healer's kit constitutes the appropriate artisan's tools
for use of Craft (herbalism).

Use the
rules as outlined under the Craft skill, in Chapter 4 of The Wheel of
Time Roleplaying Game. The DCs for making items varies depending on
the item in question.